四年级下册英语课件-《Unit 1 Home sweet home Lesson 6》课件2｜清华版（一起） (共21张PPT)

Unit 1 Home sweet home Lesson 6 填一填，补一补 The Earth is home to (全部的)of us. Let’s take of the Earth. all Who lives on the Earth? People, (动物)and (植物)live on the Earth. animals plants (空气) is important to all of us. Let’s keep the air clean. Air Who needs air? (人),animals and plants need air. People (例如),grass grows. For example (兔子)eat the grass. Foxes eat the rabbits. Rabbits Pigs eat the (胡萝卜). Tigers eat the pigs. carrots need need need need 一、need表示“需要”或“必须”,通常用于否定句和疑问句.例如： You needn’t do it again． 你不需要再做了. Need he do this homework first? 他需要先做这些作业吗? 二、在否定句中,可以用need的否定形式＋不定式完成体.例如： We needn’t have worried． 其实我们不必要慌. 三、needn’t后的不定式间或也能用进行式或被动语态.例如： He needn’t be standing in the rain． 他不必要站在雨中. 读一读 people 人 animals 动物 plants 植物 the Earth/Earth 地球 air 空气 for example 例如 all 全部的，所有的 练一练 ( ) live on the Earth？ A.Who B.How C.What